The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2021
Filed:
Feb. 27, 2018
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Tsutomu Iwashita, Osaka, JP;
Abstract
A single-focal lens system includes a first lens group having positive power, an aperture diaphragm, and a second lens group having positive power, in this order from an object side to an image side. The first lens group includes a first lens element having negative power, a second lens element having negative power, and a third lens element having positive power in this order from the object side to the image side. The second lens group includes a fourth lens element having power and a fifth lens element having positive power. When fG1 is a focal length of the first lens group at a d-line, fG2 is a focal length of the second lens group at the d-line, f4 is a focal length of the fourth lens element at the d-line, f is a focal length of an entire system at the d-line, and w is a half angle of view, a condition (1), a condition (3c) and a condition (6) shown below are satisfied.0.5<12<3.0  (1)11.5<|4  (3c)60<  (6) With this configuration, a single-focal lens system capable of favorably correcting various aberrations can be provided.